Re: PATCH: new parameter flag?

[Sven Wischnowsky <wischnow@informatik.hu-berlin.de>]

Zefram wrote:

> Actually I think it'll do full prompt expansion, affected by the options
> PROMPT_EXPAND, PROMPT_BANG and PROMPT_PERCENT.  It would be nice to
> have another flag to do just % sequences, i.e., do prompt expansion with
> options NO_PROMPT_EXPAND, NO_PROMPT_BANG and PROMPT_PERCENT temporarily
> set.  Say, (%) for just % sequences, and (%%) for full prompt expansion.

Sounds good.

(I'd still like to have a non-forking version of `$(...)' -- `${{...}}'
 doesn't seem to do anything useful at the moment, searching for a
parameter named `{...}' with braces tokenized.)

Bye
 Sven

--- os/subst.c	Tue Aug 31 13:25:35 1999
+++ Src/subst.c	Tue Aug 31 13:34:04 1999
@@ -938,7 +938,7 @@
 		    break;
 
 		case '%':
-		    presc = 1;
+		    presc++;
 		    break;
 
 		default:
@@ -1659,8 +1659,12 @@
 	}
     }
     if (presc) {
-	int len;
+	int ops = opts[PROMPTSUBST], opb = opts[PROMPTBANG];
+	int opp = opts[PROMPTPERCENT], len;
 
+	opts[PROMPTPERCENT] = 1;
+	if (presc < 2)
+	    opts[PROMPTSUBST] = opts[PROMPTBANG] = 0;
 	if (isarr) {
 	    char **ap;
 
@@ -1679,6 +1683,9 @@
 	    val = unmetafy(promptexpand(metafy(val, len, META_NOALLOC),
 					0, NULL, NULL), &len);
 	}
+	opts[PROMPTSUBST] = ops;
+	opts[PROMPTBANG] = opb;
+	opts[PROMPTPERCENT] = opp;
     }
     if (quotemod) {
 	if (isarr) {
diff -u od/Zsh/expn.yo Doc/Zsh/expn.yo
--- od/Zsh/expn.yo	Tue Aug 31 13:25:48 1999
+++ Doc/Zsh/expn.yo	Tue Aug 31 13:42:33 1999
@@ -604,7 +604,10 @@
 )
 item(tt(%))(
 Expand all tt(%) escapes in the resulting words in the same way as in
-prompts (see noderef(Prompt Expansion)).
+prompts (see noderef(Prompt Expansion)). If this flag is given twice,
+full prompt expansion is done on the resulting words, depending on the 
+setting of the tt(PROMPT_SUBST) and tt(PROMPT_BANG) options. The
+tt(PROMPT_PERCENT) option is temporarily turned on in any case.
 )
 item(tt(X))(
 With this flag parsing errors occuring with the tt(Q) flag or the

--
Sven Wischnowsky                         wischnow@informatik.hu-berlin.de